HVBATT family
HVBATT_a011_Isolation
Vehicle may not restart
What does the HVBATT_a011_Isolation alert mean?
High voltage isolation is too low for the pack to be online
What you'll see in your Tesla
- Vehicle may not restart
- Service is required
What triggers it
Isolation is measured to be below the alert threshold while pack contactors are closed
When it clears
Isolation is measured to be above the alert threshold
Potential impact
Pack may not come online
Affected models
Cybertruck
Track your Tesla's alerts automatically
Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.